213021023302031 has 16 divisors (see below), whose sum is σ = 245822879098368. Its totient is φ = 180811833876000.

The previous prime is 213021023302007. The next prime is 213021023302037. The reversal of 213021023302031 is 130203320120312.

It is a cyclic number.

It is not a de Polignac number, because 213021023302031 - 2⁶ = 213021023301967 is a prime.

It is a super-2 number, since 2×213021023302031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213021023301988 and 213021023302006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213021023302037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22734956 + ... + 30707006.

It is an arithmetic number, because the mean of its divisors is an integer number (15363929943648).

Almost surely, 2^{213021023302031} is an apocalyptic number.

213021023302031 is a deficient number, since it is larger than the sum of its proper divisors (32801855796337).

213021023302031 is a wasteful number, since it uses less digits than its factorization.

213021023302031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8009222.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 213021023302031 its reverse (130203320120312), we get a palindrome (343224343422343).

The spelling of 213021023302031 in words is "two hundred thirteen trillion, twenty-one billion, twenty-three million, three hundred two thousand, thirty-one".